Literary History Measurement 02 — Long-Duration Reader-Genesis Atlas under Xeno Coefficient v0.4, 1321–2025

This study presents Literary History Measurement 02, a prospectively frozen long-duration experiment designed to test whether receiver-relative historical support exhibits a monotonic diachronic association across eight textual realizations spanning 1321–2025 under Xeno Coefficient v0.4 measurement architecture. The corpus comprises Dante Alighieri’s The Divine Comedy, William Shakespeare’s Hamlet, Laurence Sterne’s The Life and Opinions of Tristram Shandy, Gentleman, Jane Austen’s Pride and Prejudice, Gertrude Stein’s Tender Buttons, James Joyce’s Ulysses, Kenji Siratori’s Blood Electric, and Xenobacillus glossophagii, each represented by one exact 1300-token realization frozen prior to outcome observation. Rather than retrospectively assigning literary or xenopoetic scores, the experiment applies the established R2 LTR-96 and R3 OSR-64 receiver architectures, frozen RF-BLOCK B=8 intervention, anytime-valid Counterfactual Precision, and an independent 128-control RF Support Destruction geometry stream, thereby separating mechanistic response, evidentiary precision, causal support, and canonical classification. Two prospectively defined historical coordinates are examined: M_RSD, the median receiver-specific mean RF Support Destruction value across R2 and R3, and P_CP, the proportion of four R2/R3 Primary/Holdout decisions reaching STABLE-PASS under Counterfactual Precision. Exact two-sided Spearman permutation tests across all 40,320 possible assignments yield rho=0.404762, p=0.326835 for publication year versus M_RSD and rho=0.025717, p=0.961905 for publication year versus P_CP, producing the preregistered result NO_VALIDATED_MONOTONIC_DIACHRONIC_ASSOCIATION. The experiment therefore provides no evidence, within this frozen corpus, for a single cumulative historical trajectory in which later literature systematically exhibits greater receiver-relative History dependence or more stable counterfactual support. Instead, the heterogeneous case profiles indicate discontinuous, recurrent, and receiver-dependent distributions of operational structure across historical periods, while chronology, formal experimentalism, mechanistic support destruction, and evidentiary precision remain analytically distinct. Because neither M_RSD nor P_CP constitutes a canonical Xeno Coefficient dimension, the study assigns no new C_H state, ξ value, XENO classification, aesthetic ranking, or literary-value judgment to any work. The results are consequently interpreted as corpus-internal evidence from a controlled long-duration receiver-mechanism pilot rather than as a statistical law of world literary history, while suggesting that future quantitative literary historiography should model discontinuity, recurrence, translation effects, medium change, receiver dependence, and multiple operational regimes rather than presupposing a single ascending numerical history of literature.